diff --git a/scrapy/contrib/ibl/__init__.py b/scrapy/contrib/ibl/__init__.py
index 3179c6e63..52c6e08b2 100644
--- a/scrapy/contrib/ibl/__init__.py
+++ b/scrapy/contrib/ibl/__init__.py
@@ -2,9 +2,15 @@
 This contrib implements an automatic extraction library based on an Instance
 Based Learning (IBL) algorithm, as described in the following papers:
 
-A hierarchical approach to wrapper induction
+    A hierarchical approach to wrapper induction
     http://portal.acm.org/citation.cfm?id=301191 
 
-Extracting web data using instance based learning
+    Extracting web data using instance based learning
     http://portal.acm.org/citation.cfm?id=1265174 
+
+This code has some additional dependencies too:
+
+* numpy
+* nltk
+
 """